CVE-2020-12748Network attack vector

Locked-state bypass via preferred SIM selection

Published May 11, 2020 · Updated Aug 4, 2024

Improper access control in Samsung mobile devices with Q(10.0) software allows remote attackers to change the preferred SIM while locked. Samsung has not identified the responsible component or disclosed how the preferred-SIM selection path fails to enforce the locked state. The device must be locked, and successful exploitation alters only the selected SIM preference, with no reported data disclosure or service interruption.

CVSS severity5.3
Medium
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in Samsung mobile devices with Q(10.0) software allows remote attackers to change the preferred SIM while locked. Samsung has not identified the responsible component or disclosed how the preferred-SIM selection path fails to enforce the locked state. The device must be locked, and successful exploitation alters only the selected SIM preference, with no reported data disclosure or service interruption.

The record

CVE
CVE-2020-12748
Published
May 11, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
Unavailable
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 11, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.3NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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